package text_2023_10_02;

import java.lang.reflect.Constructor;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
import java.util.Scanner;

/**
 * @author Vv
 * @version 1.0
 * @project coding_learn
 * @description
 * @date 2023/10/3 00:22:25
 */
public class Demo2 {
    public static void main(String[] args) {
        String name;
        if (args.length > 0) {
            name = args[0];
        } else {
            Scanner scanner = new Scanner(System.in);
            System.out.println("Entry class name (e.g java.util.Date)");
            name = scanner.next();
        }
        try {
            Class cl = Class.forName(name);
            Class supercl = cl.getSuperclass();
            String modifiers = Modifier.toString(cl.getModifiers());
            if (modifiers.length() > 0) {
                System.out.print(modifiers + " ");
            }
            System.out.print("class " + name);
            if (supercl != null && supercl != Object.class) {
                System.out.print(" extends" + supercl.getName());
            }
            System.out.print("\n{\n");
            printConstructors(cl);
            System.out.println();
            printMethods(cl);
            System.out.println();
            printFields(cl);
            System.out.println("}");

        } catch (ClassNotFoundException e) {
            throw new RuntimeException(e);
        }
    }
    public static void printConstructors(Class cl){
        Constructor[] constructors = cl.getConstructors();
        for(Constructor c : constructors){
            String name = c.getName();
            System.out.print("    ");
            String modifiers = Modifier.toString(c.getModifiers());
            if(modifiers.length() > 0){
                System.out.print(modifiers + " ");
            }
            System.out.print(name + "(");
            Class[] paramTypes = c.getParameterTypes();
            for(int j = 0;j<paramTypes.length;j++){
                if(j > 0){
                    System.out.println(", ");
                }
                System.out.print(paramTypes[j].getName());
            }
            System.out.println(");");
        }
    }
    public static void printMethods(Class cl){
        Method[] methods = cl.getMethods();
        for(Method m : methods){
            Class reType = m.getReturnType();
            String name = m.getName();
            System.out.print("    ");
            String modifiers = Modifier.toString(m.getModifiers());
            if(modifiers.length() > 0){
                System.out.print(modifiers + " ");
            }
            System.out.print(reType.getName() + " " + name + "(");
            Class[] paramTypes = m.getParameterTypes();
            for(int j = 0;j< paramTypes.length;j++){
                if(j > 0){
                    System.out.print(", ");
                    System.out.print(paramTypes[j].getName());
                }
            }
            System.out.println(")");
        }
    }
    public static void printFields(Class cl){
        Field[] fields = cl.getDeclaredFields();
        for(Field f : fields){
            Class type = f.getType();
            String name = f.getName();
            System.out.print("  ");
            String modifiers = Modifier.toString(f.getModifiers());
            if(modifiers.length() > 0){
                System.out.print(modifiers + " ");
            }
            System.out.println(type.getName() + " " + name + ";");
        }
    }


}
